BDNF and major depressive disorder: Among the KEGG pathways, only mLu had pathways predicted to be less repressed, including Long Term Potentiation, Axon Guidance, Long Term Depression, Ubiquitin Mediated Proteolysis, Neurotrophin Signaling Pathway, TGF Beta Signaling Pathway, Adherens Junction and Phosphatidylinositol Signaling System.